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# Copyright (c) 2001-2004 Twisted Matrix Laboratories.
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# See LICENSE for details.
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# $Id: ckeygen.py,v 1.8 2003/05/10 14:03:40 spiv Exp $
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#""" Implementation module for the `ckeygen` command.
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from twisted.conch.ssh import keys, common
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from twisted.python import log, usage
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import sys, os, getpass, md5, socket
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if getpass.getpass == getpass.unix_getpass:
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import termios # hack around broken termios
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termios.tcgetattr, termios.tcsetattr
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except (ImportError, AttributeError):
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sys.modules['termios'] = None
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class GeneralOptions(usage.Options):
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synopsis = """Usage: ckeygen [options]
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optParameters = [['bits', 'b', 1024, 'Number of bits in the key to create.'],
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['filename', 'f', None, 'Filename of the key file.'],
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['type', 't', None, 'Specify type of key to create.'],
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['comment', 'C', None, 'Provide new comment.'],
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['newpass', 'N', None, 'Provide new passphrase.'],
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['pass', 'P', None, 'Provide old passphrase']]
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optFlags = [['fingerprint', 'l', 'Show fingerprint of key file.'],
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['changepass', 'p', 'Change passphrase of private key file.'],
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['quiet', 'q', 'Quiet.'],
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['showpub', 'y', 'Read private key file and print public key.']]
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#zsh_altArgDescr = {"bits":"Number of bits in the key (default: 1024)"}
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#zsh_multiUse = ["foo", "bar"]
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#zsh_mutuallyExclusive = [("foo", "bar"), ("bar", "baz")]
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zsh_actions = {"type":"(rsa dsa)"}
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#zsh_actionDescr = {"logfile":"log file name", "random":"random seed"}
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options = GeneralOptions()
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options.parseOptions(sys.argv[1:])
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except usage.UsageError, u:
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log.deferr = handleError # HACK
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if options['type'] == 'rsa':
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generateRSAkey(options)
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elif options['type'] == 'dsa':
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generateDSAkey(options)
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sys.exit('Key type was %s, must be one of: rsa, dsa' % options['type'])
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elif options['fingerprint']:
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printFingerprint(options)
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elif options['changepass']:
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changePassPhrase(options)
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elif options['showpub']:
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displayPublicKey(options)
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from twisted.python import failure
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log.err(failure.Failure())
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def generateRSAkey(options):
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from Crypto.PublicKey import RSA
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print 'Generating public/private rsa key pair.'
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key = RSA.generate(int(options['bits']), common.entropy.get_bytes)
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_saveKey(key, options)
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def generateDSAkey(options):
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from Crypto.PublicKey import DSA
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print 'Generating public/private dsa key pair.'
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key = DSA.generate(int(options['bits']), common.entropy.get_bytes)
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_saveKey(key, options)
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def printFingerprint(options):
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if not options['filename']:
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filename = os.path.expanduser('~/.ssh/id_rsa')
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options['filename'] = raw_input('Enter file in which the key is (%s): ' % filename)
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if os.path.exists(options['filename']+'.pub'):
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options['filename'] += '.pub'
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string = keys.getPublicKeyString(options['filename'])
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obj = keys.getPublicKeyObject(string)
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':'.join(['%02x' % ord(x) for x in md5.new(string).digest()]),
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os.path.basename(options['filename']))
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def changePassPhrase(options):
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if not options['filename']:
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filename = os.path.expanduser('~/.ssh/id_rsa')
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options['filename'] = raw_input('Enter file in which the key is (%s): ' % filename)
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key = keys.getPrivateKeyObject(options['filename'])
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except keys.BadKeyError, e:
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if e.args[0] != 'encrypted key with no passphrase':
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if not options['pass']:
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options['pass'] = getpass.getpass('Enter old passphrase: ')
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key = keys.getPrivateKeyObject(options['filename'], passphrase = options['pass'])
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if not options['newpass']:
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p1 = getpass.getpass('Enter new passphrase (empty for no passphrase): ')
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p2 = getpass.getpass('Enter same passphrase again: ')
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print 'Passphrases do not match. Try again.'
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options['newpass'] = p1
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open(options['filename'], 'w').write(
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keys.makePrivateKeyString(key, passphrase=options['newpass']))
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print 'Your identification has been saved with the new passphrase.'
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def displayPublicKey(options):
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if not options['filename']:
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filename = os.path.expanduser('~/.ssh/id_rsa')
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options['filename'] = raw_input('Enter file in which the key is (%s): ' % filename)
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key = keys.getPrivateKeyObject(options['filename'])
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except keys.BadKeyError, e:
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if e.args[0] != 'encrypted key with no passphrase':
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if not options['pass']:
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options['pass'] = getpass.getpass('Enter passphrase: ')
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key = keys.getPrivateKeyObject(options['filename'], passphrase = options['pass'])
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print keys.makePublicKeyString(key)
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def _saveKey(key, options):
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if not options['filename']:
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kind = keys.objectType(key)
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kind = {'ssh-rsa':'rsa','ssh-dss':'dsa'}[kind]
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filename = os.path.expanduser('~/.ssh/id_%s'%kind)
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options['filename'] = raw_input('Enter file in which to save the key (%s): '%filename).strip() or filename
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if os.path.exists(options['filename']):
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print '%s already exists.' % options['filename']
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yn = raw_input('Overwrite (y/n)? ')
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if yn[0].lower() != 'y':
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if not options['pass']:
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p1 = getpass.getpass('Enter passphrase (empty for no passphrase): ')
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p2 = getpass.getpass('Enter same passphrase again: ')
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print 'Passphrases do not match. Try again.'
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comment = '%s@%s' % (getpass.getuser(), socket.gethostname())
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open(options['filename'], 'w').write(
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keys.makePrivateKeyString(key, passphrase=options['pass']))
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os.chmod(options['filename'], 33152)
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open(options['filename']+'.pub', 'w').write(
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keys.makePublicKeyString(key, comment = comment))
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pubKey = keys.getPublicKeyString(data=keys.makePublicKeyString(key, comment=comment))
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print 'Your identification has been saved in %s' % options['filename']
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print 'Your public key has been saved in %s.pub' % options['filename']
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print 'The key fingerprint is:'
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print ':'.join(['%02x' % ord(x) for x in md5.new(pubKey).digest()])
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if __name__ == '__main__':
added
removed
src/twisted/conch/scripts/ckeygen.py
